Elements for thin-layer chromatography

Claim 1

A THIN LAYER CHROMATOGRAPHIC ELEMENT PROVIDING A COATING ON A BASE SHEET CONTAINING PARTICLES OF A CHROMATOGRAPHIC SORPTIVE SUBSTANCE IN A FOAM EFFECTIVE FOR THIN LAYER CHROMATOGRAPHY, WHEREIN THE IMPROVEMENT IS CHARACTERIZED BY SAID COATING HAVING BEEN PREPARED AND APPLIED BY INTERMIXING A SUBSTANTIALLY HOMOGENEOUS WATER SUSPENSION OF SAID PARTICLES OF SORPTIVE SUBSTANCE WITH A WATER DISPERSION OF DISCRETE PARTICLES OF AN ACRYLIC RESIN CAPABLE OF UNDERGOING CROSS-LINKING TO AN INSOLUBLE STATE, SAID ACRYLIC RESIN PARTICLES HAVING AN AVERAGE SIZE OF NOT OVER 10-3MM. AND BEING PRESENT IN AN AMOUNT OF FROM 0.1 TO 20% BY WEIGHT OF SAID SORPTIVE SUBATANCE, SAID MIXING BEING CARRIED OUT WHILE SAID RESIN PARTICLES REMAIN DISPERSED TO PRODUCE A FLOWABLE MASS WITH SAID SORPTIVE SUBSTANCE PARTICLES AND SAID RESIN PARTICLES UNIFORMY DISTRIBUTEDD THEREIN, AND APPLYING SAID FLOWABLE MASS TO SAID BASE SHEET TO FROM A THIN LAYER COATING THEREON, SAID SORPTIVE PARTICLES SUBSTANTIALLY RETAINIING THEIR CHROMATOGRAPHIC SORPTIVE PROPERTIES WHILE BEING BOUND TOGETHER AND TO SAID BASE BY SAID RESIN HAVING UNDERGONE CROSS-LINKING.